Fuel-economizer.



No. 644,829. Patented Mar. 6', 1900.

D. RUSHWURTH.

FUEL ECONOMIZER.

(Application. filed Dec. 21, 1397.

(No Model.)

' s s e s TED STATES PATENT OFFICE.

DAVID RUSI-IWORTH, CF CLAY CROSS, ENGLAND, ASSIGNOR TO THE CLAY CROSSCOAL, LIME-AND IRON WORKS, OF SAME PLACE.

FUEL-ECONOMIZER.

' SPECIFICATION forming part of Letters Patent No. 644,829, dated March6, 1900.

Application filed December 21, 1897. serial No. 662,924. (No model.)

To all whom it may concern.-

Be it known that 1, DAVID RUSHWORTH, a subject of the Queen of GreatBritain, residing at Clay Cross, in the county of Derby,

'ers.

England, have invented certain new and useful Improvements inFuel-Economizers, (for which I have received Letters Patent in England,dated May 14, 1806, No. 10,294,) of which the following is aspecification.

This invention has reference to the apparatus for heating the feed-waterof steamboilers by means of the waste heat from the furnace, commonlycalled fuel-economiz- In this apparatus it is customary to provideappliances termed scrapers, which traverse the pipes for the purpose ofremoving any soot or the like deposited thereon, the soot as it isremoved falling into the sootchamber below;

The object of this invention is to provide mechanism or appliances formechanically and effectually extracting the soot from the soot-chamberand also assist in promoting a more thorough removal of the same fromthe pipes and other parts of the economizer.

With this object in view the invention consists in the improvedconstruction, arrangement, and combination of parts hereinafter fullydescribed and afterward specifically pointed out in the claim.

In the accompanying drawings, Figure 1 is a View principally inlongitudinal vertical section, illustrating mechanism embodying myinvention. Fig. 2 is a transverse vertical sectional view. Fig. 3 is apartial longitudinal sectional view illustrating a modified form ofapparatus.

In carrying out the invention the sootchamber a of the economizer willpreferably be constructed with inwardly sloping or inclined sides andwith the. bottom inclined downward toward the delivery end b,as shown,or in the direction of the exterior of the economizer. At the deliveryend of the soot-chamber a pipe or trunk cor the like, withgradually-constricted orifice or opening, if prepipe or trunk on theoutside will preferably This . be constructed with a flanged opening d,to

which the inlet branch of a'fan or blower e of any suitable constructionor design will be coupled up or attached. The fan or blower will beprovided with an arm or branch f, attached to the outlet, for deliveringthe soot into a pit g or the like, from which it may be removed by handor elevator, conveyer, or in any other'convenient manner. This de=livery branch will be provided with an airtight cover or valve h toprevent the entrance therethrough of cold air to the economizer when theapparatus is not at work. The sootchamber or other part of theeconomizer will also be provided with one or more suitable inlet valves,pipes, or openings 11 to regulate the admission of air when the fan orblower is running.

In large economizers two or more fans or blowers may be employed and thesoot-chamber a inclined in each direction from the center, as shown inFig. 3 of the drawings, being provided at the center with a swivelingdamper or valve m to effectively direct the current through theeconomizer.

The blower or fan may be driven from a pulley n on the shaft, providedfor driving the scrapers, or motion may be imparted to it in any othersuitable or convenient manner. Having now described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

An apparatus comprising a series of vertically-arranged pipes,vertically-reciprocating scrapers in contact therewith, a casinginclosing said pipes and scrapers, said casing provided with alongitudinally-inclined bottom,- a trunk or pipe having aninwardlyopening flaring mouth at the lower end of said inclined bottom,and a suction-fan at the outer end of said trunk, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of 'two subscr'ibin g witnesses.

DAVID RUSIIWOBTH.

Witnesses:

G. C. DYMOND, W. H. BEESTON.

